Intermittent-grip device.



K, Wu FELLOWS. INTERMITTENT GRIP DEVIGE.

MPLIOATIAON FILED MAYZI, 1907.

Patented July 20, 1909.

| l I I r plate removed.

lJNITED sTnTns OFFMJ.

HUGH W. FELLOWS, OF ()AHUENGA, OnLllfiUllhlA, A SIGNOR TO FELLOWS Dlltlitll POWER TRANSMISSION COMPANY, OF LOS ANGELES. CALIFORNIA, A CORPORATION 01 ARI-- ZONA TERRITORY.

INTERMITTENT-GRIP DE VICE Patented July so, 1909.

Application filed May 27, 1907. Serial No. 376,025.

To all whom it may concern:

Be it known that I, linen al i nupws, a :itizen of the United States, residing; at Cahuengfa, in the county oi Los Ane'elcs and E tate of California, have invented a new and useful Intermittent-Grip Device, 01' which the i'ollowing is a specification.

This invention relates to an intermittent grip device, and the objects of the invention are to produce a device oi. that character which may be readily controlled to impart a. forward motion or a rearward motion to the driven element, or torelease the driven clement.

Another object is to produce imixiinuin gripping; eh'ect and prevent slippage, a fur ther object being to reduce wear ol the parts,

and provide simple and economical construe tion having great strength.

The accompanying drawings illustrate the invention, and. referring: thereto :---l i;1'ui.'e 1 is a side elevation ol the invention with a portion of the controlling sleeve broken away. Fig. 2 is a view similar to Fig. 1 with the controlling sleeve, fingers and. nearest Fig. 3 is a section on line et -m Fig. 1. Fig. 4- is a perspective of the controlling sleeve.

, 1 designates the driven shalt upon which is keyed a disk 2, the periphery of which has a V groove. Mounted loosely on the shaft 1 on each side of the disk 2 are side plates 3, connected together by bolts 4. upon which are placed the spacing sleeves or collars 4, one of said sleeves being provided or connected with an operating rod or pitinan 5.

' A series of rollers 6 are arranged between the plates 3, each roller being mounted on a shaft 7 and the shafts 7 being journaled in the plates Each roller 6 is eccentrically mounted on. its shaft 7, as clearly shown in Fig. 2, and the rollers are arrainredin two sets, three 01' the rollers a having, their eccentric center at one side of a radius drawn from shaft 1 and the other three rollers I) having their eccentric center at'the other side ot a radius drawn from shaft 1. The eccentric center of each roller 6 is adjustable by rocking its shalt 7 and the rollers 6 are adapted.

to grii in the V groove in the disk 2, or to roll idly therein, or to lie lree therefrom will be described.

In Fig. l, the dotted lines show rollers b in. engagement with the disk and rollers cent of engagement with thedislt. A

Mounted on the end of each shalt 7 a linger 8, a set screw 2] serviini, to hold it adjustably on the shaft, and the lirnrcrsfi are arranged in pairs, one linger 8 ol one pair being attached to the shaft of a roller aand the other linger ol' a pair being attached to the adacei'it roller 1), and the two lingers of a pair are connected by a coil tension spring Mounted to reel: and slide on shalt '1 is a con trolling: sleeve 10 having a grooved collar 11 adapted to be one by a l'orlzed lever, not shown, for operating the sleeve, and the sleeve is rifled to form three spiral grooves 12. The two .l in gers of each. pair rest in the Spll'fll groove associated therewith. A' pin 13 carried by one ol' the plates 3'projects into a longitudinal hole 14 in the sleeve 10 and serves to oscillate the sleeve in unison with the plates 3 and yet permits the sleeve to be adjusted slidably along the-shalt 1.

By sliding; the sleeve 10 on shalt l, the tingers 8 which. engage in the spiral grooves of the sleeve may be adjusted to regulate the angular position. of the eccentric rollers. Thus, when. the sleeve 10 is moved in one direction the lingers of one set of rollers are rocked so that those/rollers are tree from the grooved. disk 2, while the other set ol' rollers are moved into contact with the grooved disk, and when so adjusted the plates 3, as they rock in one direction, cause the rollers which are in. contact with the grooved dish 2 to grip tightly the wedge in the groove in the disk, which results in turning ti .2 disk 2 and shalt 1 at an angular speed equal to that ol' the plates 3. This gripping el'lcct is ninrh greater by reason oi the Vshaped contact which all'ords a, wcdging ci'lcct due to the pressure of the contacting rollers, and the eccentricity ol' the contactiiur rollers is such that they have a tendency to roll in and increase the combined gripping and edging ellcct. l.)uring the back stroke ol the plates 3, the contacting rollers roll .l'rccly back over the disk 52 without exerting any wedging or the rollers to roll into tight engagement, their tendency being to turn. the opposite way which loosens the engagement. Thus, din mg each forward stroke the shalt 1 is operated forward, and during each back stroke the ial't may turn under its inon-ientunii or by power derived from another clutch not shown.

Cir

All

By moving the sleeve 10 into its opposite position the-relative adpistmcnls ol the two sets ol rollers are reversed with the result that the disk 2 is driven. in the opposite direction, inasn'iuch as the eccentricity ol' the contact ing rollers lies on the other side ol' their radii By moving the sleeve ll) into a l shafts, lingers on the respective operates in unison therewith, hut there is no relative movement imparted to the fingers S 1 until. the sleeve 10 is shihed lon;; ;itudmall v.

hat l. claim l. in an intermittent grip device, a contralv mounted disk having its periphery provided with a circumfcrential groove, a supporting n'nmhor conconlricallv mounted upon each side of said disk, a plurality of shafts jonrnalcd. .in said mei'nhors around the periphery of the disk and at an equal distancc therefrom, a roller securedeccentricall upon each shaft, the eccentric center of each roller heing' upon the side of a line d ra on from the center of its shaft to the con-- ter of the disk, means for simultaneously oscillating said shafts to shift the eccentric centers upon one side of said lines each toward its line and the other centers away from their respective lines, and means for oscillatinc said siupportingnicmhers, whereby each. altin'natc roller is moved into en' gagemcnt with said disk.

2. In an intern'iittont grip device, a shalt, a dish mounted concmitrically thereon having its periphery provided with a circumlerentia move, wedge shaped in cross secc mounted upon each side of the disk, shells iournalcd in said plates around the. periphery ol the disk and at an equal distance therefrom, a roller secured eccentrically upon each shaft having its periphery wedge shaped in cross section to lit in the groove of said disk, the eccentric center of each roller being; upon the side of a line drawn from the center of its shaft to the center of the disk, means for simultanemisly oscillating said shalt-s to cause the alternate rollers to he moved into contact with said disk and the other rollers to he moved in-the opposite direction, and means for oscillating said plates.

3. in an intermittent grip device, a shaft,

a circumlcrontially groovedalisk thereon, a plate mounted on each side of the disk, bolts and. sleeves for holding said disks in position,'a pitman connected with. one of said sleeves, a plurality of shafts in said plates around the disk at an equal distance from its periphery, a' roller secured e .:centricall v on each shalt in position to be nmved into and.

i and adapted torock and slide thereon, a

said disk and the other rollers to he moved in the opposite direction.

i. In an intermittent grip device, a disk, an oscillatory member concentric with the disk, a series of rollers adapted to contact with the disk carried by the oscillatory member, shafts journalcd in said member, said rollers being ecccntrica l3 mounted on said shafts, and means oscillating with said oscillatory me1nher and slidahle with relation thereto and engaging; said "lingers for swinging the in hers to vary the angular position of eccentricity ol the rollers when the lingerongaging means is m ved longitudinally.

.ln an intermittent grip device, a disl', an oscillatory member concentric with the disk, a series of rollers adapted to contact with the di. carried by the oscillatoi v in anher, shafts journaled in said member said rollers hcing ei'zccnt-rically rm i said shafts, lingers on the respect-iii means oscillating with said oscill slidahlc with relation th said fingers for swinging the angular position of rollers when the linger moved. lo ngitu din ally, rangeiil in two sets, tho 'city of the rollers of one set being on of radial lines through the disk and eccentricity of the other set being" on the opposite side of radial lines through the dish, the two adjacent fingers of each two adjznrcnt rollers of dii'l'erent sets forming a pair.

6. in an intermittent grip device, it a disk fastened on the shaft, a pair of pi mounted to rock on the shalt and arran; on opposite sides of the disk,

engaging to varv rollers adapted to contact with the pcrzphcry of the disk, shafts journalcd in said plates and ca1"ryii1g".thc' respective. rollers, each roller having its periphery eccentric of its shaft, fingers on the' respective shafts, a con trolling sleeve loosely mounted on the shaft projecting from one 01'. said plates into a in said sleeve, the sleeve having- 1 ll. grooves, each groove receiving the ends of two of said lingers, the two rollers associated with each. pair of two fingers having their eccentric centers arranged opposite to each other, and a tension spring connecting the two fingers of each pair of lingers.

In testimony whereof, I have hereunto set my hand at Les Angclcs, California, this 20th day of May 1907.

HUGH. W. FELLOWS.

In presence ef- GEORGE T. HAGKLI'JY,

FRANK L. A. Grammar.

lOt 

